title: Does 1 + 1 = 2? A continuing debate.
authors.forename: D J
authors.initials: DJ
authors.lastname: Cole
authors.forename: M W
authors.initials: MW
authors.lastname: Kalichman
authors.forename: H M
authors.initials: HM
authors.lastname: Shapiro
authors.forename: E I
authors.initials: EI
authors.lastname: Eger
mesh_terms: D000777:Anesthetics / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage*
chemical_list: D000777:Anesthetics; D009609:Nitrous Oxide